Rotary drum milling machine



Sept. l2, 1933.

E. J. FOURNIER ROTARY DRUM MILLING MACHINE Filed Oct. 22, 1928 l2 Sheets-Sheet 1 77717276127 nez V12/Za r2; ziel' 61H0 my:

sept. 12, 1933. E J. FOURNIER 1,926,332

ROTARY DRUM MILLING MACHINE Filed Oct. 22, 1928 l2 Sheets-Sheet 2 o il w o wg A ZM 4-OQ W l 1 /f '1% u 3f l Sept. 12, 1933.

E. J. FOURNIER ROTARY DRUM MILLING MACHINE 12 snets-sheet 3 Filed Oct. 22, 1928 Sept. 12, 1933. E. J. FOURNIER ROTARY DRUM MILLING MACHINE l2 Sheets-Sheet 4 Filed Oct. 22, 1928 nlm( LLllI 12 Sheets-Sheet 5 E. J. FOURNIER Filed Oct. 22', 1928 sept. 12, 1933.

me/whom Sept. l2, 1933.

Filed oct. 22, 1928 E. J. FOURNIER ROTARY DRUM MILLING MACHINE 12 Sheets--Sheei'I 6 INVENTOR WMM/75141117@ rn zw Sept 12,1933.

E. J. FURNIER ROTARY DRUM MILLING MACHINE Filed oct. 22, 1928 12 Sheets-Sheet 7 INVENTOR ,L mf

A//TORNEYS Sept 12, 1933- l E. J. FOURNIER 1,926,332

ROTARY DRUM MILLING MACHINE Filed Oct. 22, 1928 l2 Sheets-Sheet 8 aww/wko@ im??? 471 zz e( ffl/Zurf? er crm/Ms sept. 12, 1933. E FOURNlER 1,926,332

ROTARY DRUM MILLING MACHINE Filed Oct. 22', 1928 12 Shee1;:s--Shee"tI 9 k \v Il \f MM5 Sept. 12, 1933. E. J. FOURNIER 1,926,332

ROTARY DRUM MILLING MACHINE Filed 0012. 22, 1928 l2 SISGS-Sheet 10 Sept. l2, 1933- E. J. FOURNIER 1,926,332

ROTARY DRUM MILLING MACHINE Filed oct. 22, 1928 12 Sheets-sheetdl ffy/6 INVENTOR 7777727427 a e8 Jjzawer @Y wf 2f ATTOR EYS Sept. 12, 1933. E. J. FOURNIER ROTARY DRUM MILLING MACHINE 12 sheets-"sheet 12 Filed Oct. 22, 1928 Il lllll ATT RN'EYS Patented Sept. l2, i933l PATENT] oFFicE ROTARY DRUM MILLING MACHINE Emmanuel J. Fournier, Detroit, Mich., assigner to Production Engineering Company,V Detroit,

Mich., a corporation of` Michigan Application october 22, 1928.1; serial No. simio 9 claims. (c1. en -2o) rThis invention relates to milling machines, and

more particularly to surface milling machines of the continuous production type, having a comparatively large drum or work-table adapted to carry a number oiparts to be milled, and continuously rotating to successively advance such parts past a plurality of cutters.

One of the objects of this invention is the provision oit' a simple and sturdy milling machine affording the requisite rigidity and accuracy while giving a maximum flexibility of arrangement and adjustment of its working parts.

Another object of this invention is the arrangement in a continuous millingv machine of a plurality of independently actuated cutter units,

which may be combined in any desired combina-- tion of rougi-ling and finishing cutters, separately adjustable vertically or horizontally," to suitably position them toward or away' from each otheror 2O the work-carrying drum, anddriven independent-ly or in groups, at any desired speed. Thus, ior example, one or two roughing cutters and one finishing cutter maybe provided at either or both sides of the work-carrying drum, according to the requirements of the parts being milled. Each cutter is mounted on separately driven spindles and can be driven at various speeds regardless of the speeds of the remaining cutters. Also the cutters may be separately moved toward or away from the drum, toward and away from each other horizontally, and up or down vertically.

A further object of this invention is the provision upon a suitable base of a pair of vertically adjustable sp ced housings forming supports for the trunnicne ci the work-carrying drum and the various cutter units, one of the housings being also adjustable toward or away from theother to accommode-tel different drums o various widths and diameters carrying parte of various sizes. l0 Other objects and advantages will be apparent from the following description, wherein referenceY is made to the acconipanying drawingsillustrating preferred embodiments of my invention, and wherein similar reference numerals designate similar parte throughout the several views.

In the drawings: f l,

Figure l is a side elevation of a milling machine constructed in accordance with my invention.

Figure 2 is a vertical sectionalV View taken substantially on the line 2-2 ci Figure 1. Figure 3 is an enlarged vertical, sectional vie through one of the cutter units. Y

Figure 4 is an enlarged detail elevation of the driving mechanism for the work-carrying drum.

ness to .bring'its upper `suriaceinto the' same Figure 5 is a plan View thereof.

Figure 6 is a detail sectional View taken substantially on the-line 6 6 of Figure 3.

Figure l is a detail horizontal' section showing the micrometer adjusting,means-utilized in connection with the cutter illustrated in Figures 3, Y

v6 and 3, and taken substantially on the line '7-7 of Figure 8. Y Figure 3 is a detailcross-section taken substantially on `the line 8-8 of Figure.

A p Figure` 9 isa vertical section taken substantially on the line 9-9 of Figure 3.

Figure 10 is a rear view of one of the cutter units illustrated in Figures 3 and 6 9, inclusive.

Figure 1l is a central vertical section through a 70 modified form oi cutter unit.l v

Figure 12 is. a detailV sectionalview taken substantially. on the line 12-12 of Figure l1. Figure `13 is a central vertical section through a further modied lform of cutter unit wherein a'pair of cutter spindles are mounted within a single unit. .l v

Figure 14 is a view similar to Figure 2, but showing the housings supporting the work-carrying drum and cutter units adjusted vertically relative to the base.

Figure 15 is an enlarged detail section showing an alternative form of driving mechanism for the work-carrying drum, wherein manual adjustment of the drums positions may be readily Veffected to facilitate the preliminary set-up of the work. j

rFigure 16 is a detail'horirzontal sectional `view :showinga modified form of micrometer adjustment mounting for varying the position 0i" the 90 spindle ofthe cutter unit such as is shownin Figure 3, and f Figure 17 is a side elevation similar to Figure l, but wherein the individual cutter units may be separately adjusted vertically relatively to the base and standards of the machine.

. VReerringriow to the drawings, the numeral 5 designates a base for my improved milling Ina-` chine, and preferably formed adjacent one side with a raised platform portion 6 -forming a sup- 100 port for one of the standards, as'l, in which the trunnions S of the work-carrying drum 9 is jour- ,naled Adjacent its other side thejbase 5 is formed with guide-ways 10 wherein a sub-base or iillerplate 11 is slidably mounted so that 'it can be adjusted toward and 'away irorn the raised platform 610i the base to Vprovide any desired clearance between the standards '7 and 7a. The filler plate 11 is preferablyl of the requisite thickspaced hollow legs resting upon the base or'ller.V

plate carried by the base and joined. at their upper extremities to form asaddle for the lower half of the bearing 8a in which the trunnions 8 of the work-carrying drum revolve. 'A remove able bearing cap 12 carried by each housingnts over theupperhalf of the bearing 8a to compietely encompass the trunnions 8. Obviously;

after the removal of the bearingcaps 12`;'the

work-carrying drum may be lifted from the housings7 and?1 and replacedwith drums of different diameters or widths to accommodate various sized parts to be milled. The work-carrying drum 9 is provided with ya plurality of work-carry@ ing surfaces, and any suitable means maybe utilized for securing parts to be milled, such as is shown at 13 in Figure 1, upon these surfaces, In use, the drum 9 is continuously'rotated atfa comparatively slow rate of speed, the work to b e milled being secured upon a surface of the drum when itfis spaced from the lcutters, and then' after the drum has carried the work past .the cutters, the work is removed from the drum and a newpart to beV milled secured in its place.

A preferred form of .driving mechanism forl driving the work-carryingdrum 9 is'shown dia grammatically in Figures 4 and 5. A motor 14 is secured upona suitable bracket 15 andits shaft is coupled to an elongated shaft 1,6 through a coupling 17. On the shaft 16 is arranged'a worm gear 18 meshing with a wormpinion V19 fixed upon a horizontally disposed shaft 20 vwhich also carries a spur'pinion 21 adapted Vto mesh with av spurI gear 22 xed upon the parallel shaft 23 v secured upon a vertically disposed shaft 26 carry? (note-Figure- 5).' The shaft 23 carries a worm gear 24 adapted to mesh with a worm pinion 25 ing a worm gear 27, which in turn meshes with the comparatively large worm gear 28 fixed to i one of thetrunnions 8 of the work-carrying drum (note Figures 1 and 2). While the illustrated embodiment of this drive mechanism vprovides for a reduction of speed from motor to drum of o approximately 40,000 yto 1, any desiredratio of speed reduction may beY securedV by properly choosing the inter-meshing gears and pinions. To enable a rapid change in' speed reduction, I have arranged the spur gears 2,1 and 22 as pick od gears, and various combinationscf spur gears may lsubstituted for those illustratedherein.

9 will carry the parts to be milled between the spaced housings 7 and 7a, and suitable cutters for milling 'or otherwise working upon such parts may be supported upon or adjacent the housings;

In the present disclosure, 1 have arranged a plurality of independently operatedV cutter units so that each of them maybe separately mounted and adjusted to perform its desiredlfunction. A pair of such cuttervunits are illustrated inrear elevation in Figure 1 and in side elevation inY Figure 2. One of .them is best illustrated, however, in Figure Y3, wherein is shown Yin section a preferred arrangement V.of drive mechanism for the cutter headsaswell as the means` for adjusting the cutter longitudinally of the units.v The cutter unit comprises aV motor 29 suitably mounted upon the base or one ofn the standards, as 7', the shaft 30 of which is connected through `a suitable coupling 31 `with the stub shaftr32 on which is mounted a Worm gear 33 meshing with aworm pinion 34 fixed upon a circular flange 35 eX- tending from an elongatedsleeve member 36 loosely surrounding a central portion ofv the spindle 37 Aand formed adjacentone extremity with elongated spur gear teeth 36a meshing with a spur gear 38 xed upon a short shaft 39 arranged parallel with the spindle'37 and carrying adjacent its rear extremity a spur pinion 40 meshing with'a spur gear 41 splined upon the Arear portion' ofthe spindle 37.

This arrangement permits the driving of the cutterfspindle 37 at any desired speed,` both becausev ofl the fact that it is driven from an independent motor 29 and because the arrangementk such that the spur gears 40 and 41 may Vbe readily changed to embody diiferent combinations of `toothed gears, upon removal of the Vrear closureY plate 42 of thecutter housing. `In other words, the spur gears .40 and 41 are arranged as pick-off gears .to facilitate changes of ratio in the reduction of speed from the motor Q to the spindleV 37. the illustrated embodiment provides for the It will also be noted that mounting of all the gears and pinions within the cuttervhousingvon ball or roller bearings, there- Yby reducing friction to a minimum, while at the same time permitting longitudinal movement of the spindleV 37 for purposes of adjustment of the cutter, as hereinafter described. YForce feed -lubricationrmay also be readily utilized in connection with my improved cutter drive mechanisrn, as .for example through the actuation of a pump plunger 43 through the cam 44 fixed upon the spindle 37. The specific lubrication means is not an essential partof the present invention,

and yonly so much of it is illustrated herein as isbelieved to be `necessary to indicate its use.

Y-Forwardly of the drive mechanism above described, the spindle 37 is formed with ay portion 37a of `larger diameter which carries a pair of inner bearing races 45 engaging circumferential series of bearings 46 which in turn engage the outer bearing -races 47 secured adjacent the opposite ends of a sleeve 48 mounted within the forward portion of `the cutter housing so that it may be slid longitudinally for purposes of adjustment of the spindle and cutter. As best shown in Figures 3 and '6, the sleeve 48 may be clampedin any adjusted positionwithin the cutter housing through the medium of a pair of clamps mounted within the upper portion of the housing. Each clamp comprises a Vpair of slidable jaws 49 having beveled lower faces adapted'to pressupon the periphery of the sleeve 43 when As above-described, the rotation of the drum 1 moved toward each: other through the action of the adjusting bolt 50. As herein shown, the bolt 50 'is formed with-` a polygonal head and a shoulder 5lV engaging the outer edge of one of the clamps 49, the shank of the bolt passing through one clamp and being threaded into the other clamp. Rotation ci. the bolt 50 in one direction will accordingly move the two clamps 49 towardeach other against the tension -of an intermediate springlL to exert a ciamplng Vaction' upon the sleeve 43, while rotation of the bolt in the opposite kdirection will serve to separatethe `clamping jaws 49 to free the sleeve 48, being aided in such movement of the clamping jaws by the spring a. `To permit the longitudinal sliding of the sleeve 48 and the spindle to effect the desired adjustment, means may be provided such as are best illustrated in-Figures -7 and 8. Arbracket 52 isy secured to the side of the sleeve 48 and extends laterally int'o a longitudinal groove 53 in the cutterunt housing. The exterior portion of the bracket 52 is provided with a threaded aperture for the .reception of the adjusting bolt 54, the shank of which is journaled within an aperture in therear wall 55 of Vthe elongated slot 53. The bolt 54 is preferably provided with a polygonal head exteriorof the slot 53 and a graduated dial 56 may be secured on such exterior portion in engagement with the rear facev of the Vwall 55. Such rear face of the wall 55 may also be marked with suitable indications to enable a micrometer adjustment of the bolt` 54 to slide the bracket 52 and attached sleeve, longitudinally of the housing. During such longitudinal movement of the sleeve 48, the spindle 37 slides within the hub 36 of the worm gear 34 and within the spur gear 41, the elongated spline permitting sliding movement of the spindle relatively to the spur gear 41 without affecting the rotation of the'spindle by such gear 41.

The cutter 57 is secured to the forward portion of the spindle 37 in any desired manner, and adjacent the cutter 57 is preferably mounted a fly-wheel 58 to give constant momentum'to the rotating -spindle and eliminate vibration. herein shown, I mount the fly-wheel 58 upon the spindle by securing the central portion thereof to a flange 59 exterior of the housing, the forward face of the ily-wheel terminating as close to the forward end of the spindle as can be expediently done while providing room for insertion of a pin 60 or other securing means for fastening theV cutter 57 upon the spindle. f

By virtue of the above described mechanism,

.means are provided for roughly adjusting the cutter housings relatively to the work 13 upon the drum 9 by the mounting of the housings upon the base 5 or sub-base 1l of the machine. Then une adjustment of the cutters 57 may be secured through the micrometer adjustingmeans, after which the clamping jaws 49 secure the cutter 57 and its attached spindle in the desired adjustedl position. This arrangement Jfacilitates the securingof the precise adjustment of the cutters needed for accurate machining, while maintaining rigidity in the mounting of both the workcarrying drum and the several cutters utilized therewith. Since each cutter is driven by a separate motor and separate reduction gearing between the motor and spindle, itis obviously possible to secure any desired speed on any cutter, with the result that dil'erent speeds may be provided for the roughing and iinishing cutters, or any otherl desired speed arrangement may be effected. 1

In Figures l1 and l2 are illustrated a modified forni of means for securing the desired iine adu justment of the cuttersv 57. In this embodiment,

the entire cutter' housing is adjusted longitudinally instead of the spindle only. The lower portion of i"ne housing 61 is formed with spaced standards 62 slidably mounted within guide-Ways arranged in the sub-base 63, a bracket 64 depend-y lng from the housing 61 between the standards and receiving the threaded portion of the adjusting belt 65. '.'Ihe shank of the adjusting bolt 65 is journaled within the apertured` rear wall 63UL of. the sub-base, and exteriorly of the sub-base the bolt is formed with a 66 bearing against the rear face of the wall 63?. Rotations of the adjusting bolt 65 will slide the housing 61 within'the guide-ways-SS as desired Vmoved as an entirety toward or from the work 13 upon the work drum 9, or toward or frornfits companion cutter unit on thev saine side of the cutter drum, the base of the unit being then secured in the desired` adjusted position upon the Vbase platform 6 of the milling'machineor a filler plate 11 (note Figure 2) vertical adjustments of `polygonal head and carries a graduated dial.

the cutter units are secured'either simultaneously with vertical adjustment of` the standards 7 and 7e relatively to the base of the milling machine, or may be secured by the use of independent filler plates 84-interposed between the base ofthe machine or a filler plate carried thereby, as 11, and the base of the cutter. unit. Obviously, as many filler plates of appropriate thickness may be interposed below the base ofthe cutter unitl as is necessary to bring the cutterof such unit to the desired height.

In Figure 13, I have illustrated another modil cation of my improved cutter mounting arrangement, wherein a pair of cutter spindles and attached cutters may be mounted within a single housing and simultaneously driven through mechanism housed thereby. In this embodiment, the worm gear 67 is suitably driven from a motor or other sourceV of power, and meshes with the Worm lpinion 68 fixed upon .a circular flange 69 extendingfrom an elongated sleeve member 70 loosely surrounding a central portion of aspindle 71, and former adjacent its rear portion with elongated spur gear teeth 72. Suitable mechanism, such as is shown in Figure j3, may be utilized for effecting desired reductions in speed between the toothed sleeve 72 and the spur gear '.73 splined upon'they rear portion of rthe spindle 71.` Such reduction'gearing is notfully illustrated in Figure 13, but a pinion 74 thereof is shown in mesh with the teeth 72 of the sleeve 70, and it is to be understood that the remainder oi'the reduction gearingis carriedin substantially the same plane with, but behind, the spindle 71. The rotation of through the medium `of a pinion 76 xedupon a stub shaft 77 intermediate the spindles, andthe spur gear 78v splined upon the supplementary spindle 75. 'Ihe intermediate pinion 76 meshes with both of the spur gears 73 and 78, whereby the two spindles will bedriven in the same direction, and at the same speeds. In Figures 13 I have also illustrated an arrangement of` ,l cutter-carrying spindles wherein the spindles are so closely placed the supplemental spindle 75 remote from its cutter- 82. This arrangement gives thebenet vof the fly-wheel to each spindle while permitting relatively close positioning vof the -`Acutters carried thereby.

` In Figure 1.4 I have illustrated a preferred meansA 125 the spur gear 73 splined upon the spindle 71 will lsimultaneously rotate a supplementary spindle 75 of vertically adjusting the standards for supporting-the trunnions of the .work-carrying. drum as well as for' the several cutter units. In this embodiment, a. pairof iiller platesg'83 and 83u areA secured upon the upper surface of the raised portion 6 of the base 5 andthe sub-base 11,'respectively. The standards 7 and 7e, are then mounted upon the {dller plates .83 and 83a'. It will be observen that this arrangement permits the sliding of the standard 7St relatively to the other standard to change the distances between the standards to 'n accommodate work-carrying drums of different widths and diameters, while in no way impairng the provision forinounting the drums or the several cutter units.

In Figure 5 is illustrated va modified form of drive mechanism arranged between the motor 14 and the, work-carrying drum.V In this embodiment, the same motorll may have its. shaft connected to the illustrated shait'l through a suitable vclutch 17, with the. shaft 16 carrying a worm gear 18. Instead, however, of having the worm gear 18 meshing with a worm pinion fixed upon a horizontally disposedshaft, I arrangeY a worm pinion 85 upon a vertically disposed shaft 86 to mesh with the worm gear 18, the vertical shaft 86 being mounted in appropriate bearings 87 to permit its free rotation andabsorbing thrust. The vertical shaft 86 isv also arranged, preferably, so that it will enable the use of an automatic clutch between the motor lli `and the worl; drum to permit continuous rotation of the motor .without damageto the remainder of the `milling machine veven should some Yaccident result in stopping theY rotationfof the work-carrytion of the shaft 86Y but divided therefrom to permit rotation of the shaft 86 withoutr eifecting rotation of the stub shaft 86a except throughthe clutch faces 87 and 88. A coil spring` 89 presses the clutch member 88 toward the clutch meniber 87 and ordinarily maintains the clutch members inoperative relation so that the stub shaft 86a is driven simultaneously with thev shaft 86. Should it happen, however, thatvfor some reason the work drum orassociated-parts become V ,i jammed, resistance to rotation of the stub shaft 86a would be immediately offered, but, since the motor 14 would be continuously driving, the `lower clutch member 87 would ride upon. the upper clutch member 88, ordinarily lifting the clutch member 88 against the tensionof the spring 89 until the current to `the Vmotor 14 has been shut off. The automaticy slippage `thus effected beis formed adjacent its upper extremity with 'av clutch 'face 93 whereby through the vinterposition of a suitable tool having -a companion l a cutter unit.

clutch face 94, the shaft 92 andV its wormgear 27 may be manually rotated whenever desired. Such manual rotation of the shaft 92 is particula'rlyuseful in effecting` `the preliminary set-up of the Worleon the work-carrying drum in ad- Vance'` of the continued use of the milling'machine.' While the work-carrying drum can be rotated through partial revolutions through the medium of the motor 14 and associated driving mechanism, it is quite diicult Ato stop the i. motor just when desired to secure exact adjustments of the drums position.v By directly rotating the shaft 92, however, its worm gear 27 directly moves the worm pinion .28 on the work-carrying drum and so desired adjustments ofthe drums position may be quickly and accurately secured. This modification ofthe ldriving mechanism between the work-,carrying drum and 'motor 14 has: the advantages of safety, simplicity, and convenient manual adjustment. Y

.In Figure 16 I have illustrated a modified form ofv micrometer adjusting .means for effecting longitudinal adjustments-foi the spindle of In this embodiment, the graduated dial 56'a is mounted adjacent the rear face 100 of the cutter housing where it can be conveniently reached by the operator should re-adjustment of a spindle be desired Vwhile the cutter unit is in position upon the milling machine. The dial 56n is secured upon: an elongated adjusting'shaft 54e, the threaded portion of which meshes with a threaded aperture in the radially extending bracket 52a carried by the sleeve 48e. The remaining parts oi the cutterfunit are substantially identical with those illustrated in Figure 3. l

From the'foregoing, it will be apparent that I have devised a simple compact milling machine wherein any suitable number of cutters may be advantageously employed or performing work upon parts to be milled carried by various sized drums. The speed of the ycutters mayv be varied tosuit. the requirements ofthe work to be 'done thereby, and the speed or" the work-carrying drum may be varied at will. Force feed lubrication isyto be employed throughout the machine, though the details of the'lubrication system is not Vshown herein in its entirety. Also, it is to be understoodthat suitable clutchesr or the like may be interposed between the motors and the parts driven thereby as required by safety regulationsor for the convenience of the operator.

While it will be apparent that the illustrated embodiments'of myV invention herein disclosed .are well calculatedfto adequately fulll the objects and advantages primarily stated, it is` to be understood that the inventionY susceptible to variation, modiflcationand change within the spirit and scope of the subjoined claims.

I claim: i 1.*In a machine of the character described, a base having a raised platform `at one side thereoi', a fixed standard mounted upon the platform,

guide-ways hired upon the base laterally .of the platform, a iiller plate mounted for sliding movement within the guide-ways, a standard fixed upon the iiller plato, a work-carrying drum removably'mounted for rotation in standards, means for driving the drum, and a plurality of cutter units respectively secured upon the platformand ller plate opposed relation, whereby slidable adjustment oi the iille'r plate will simultaneously changel the distances between the standards and the opposed cutter-units. i

l 2. In a .machine of the characr described, a 50 base' having a raised platform` at one side thereof, a fixed standard mounted upon the platform,` guide-ways fixed upon the base laterally of the platform, a filler plate mounted for sliding movement within the guide-ways, a standard xed upon the filler plate, a work-carrying drum removably mounted for rotation in said standards, means for driving the drum, a plurality of cutter units respectively secured upon the platform and iiller plate in opposed relation, whereby slidable adjustment of the filler plate and standard carried thereby will simultaneously change the dis,- tances between the opposed: cutter units,..and a motor included in each unit for separately actuating each cutter.V Y

3. In a machine of the character, described, a base having a raised platform at one side thereof, a xed standard mounted upon the platform,

guide-ways fixed upon the base laterally of the platform, a nller plate mounted for sliding move- Y ment within the guide-ways, a standard fixed upon the filler plate, a work-carrying drumremovably mounted for rotation in said standards,

means for driving kthe drum, a plurality of cutter unit assemblies respectively 'secured upon the platform and ller plate in opposed relation, 'whereby slidable adjustment of the filler plate will simultaneously change the distances between the standards and the opposed cutter units, and

Ameans for adjusting the position of each cutter unit assembly relatively to Jhe platform or ller plate upon which it is'secured.

4. In a machine of the character described, a base having a raised platform at one side thereof, a fixed standard mountedupon the platform, guide-ways fixed upon the base laterally of the platform, a iiller plate mounted for sliding movea 5. In a machine vof' the character described, a base having a raised platform at oneside thereof, a fixed standard. mounted upon the platform, guide-ways fixed upon the base laterally of the platform, a ller plate mounted for sliding movement within the guide ways, a standard fixed upon the ller plate, a work-'carrying drum removably mounted for rotation-in said standards, means for driving the drum, a plurality of independently driven cutter unit assemblies respectivelysecured upon the platform and filler plate in opposed relation, whereby slidable adjustment of the nller plate will simultaneously change the base,ia pair of standards mounted thereon, one

of said standards' being fixed and the other slidable, and each having a pair of opposed separated legs, a rotatable work-carrying drum journaled in the standards and having its axis substantially parallel to the line ofmobility of the slidablevstandard, means for driving the drum, and a plurality of cutter unit assemblies one of which is mounted upon the base between thelegs ofthe xed standard, and another-of which is positioned partially beneath ythe slidablev standard and movable either together therewith or independently thereof. l

'7. In a machine of the character described, a base, a xed standard mounted thereon, a slidable support also mounted thereon, another and complementary standard carried by the yslidable support, awork-carrying drum journaled in the standards, means for driving the drum, a cutter assembly mounted upon the base laterally of thev work-drum, `and another cutter assembly carried by the slidablesupport and m'ovableboth independently thereof andv together therewith. l

8.V In a machine of the character described, a base, a pair of supporting standards mounted thereon, each having spaced legs, a work-carrying drum journaledl in the standards, means appurtenant one standard for driving the drum, means for moving the other standard toward and away from the first, a plurality of cutters separately mounted upon the base adjacent the drum and between-the spaced legs of the standards, inde- `pendent motors for driving-each cutter, and independent means for adjustingv the position of each cutter.

9. In a machine ofthe character described, fa I base, a pair of supporting standards mounted thereon, each having spaced legs, a work-carrying drum journaled in the standards, means for moving one standard toward and away from the other; means for driving the drum, means for by adjusting the positioningof the movable standard upon the base and of the individual units with respect thereto, and means for securing iine adjustment of each cutterunit by moving parts only of the unit relatively to the remainder thereof. y

. EMMANUEL J .Y FOURNIER. 

